Logic Puzzle 1

It's time to prove your Spock-like levels of logic.

of 2

Piss-up puzzle

You're organising your weekly "whisky and ale" party but the crates of supplies have been mislabelled. Actually, though, you only need to open one of them to work out what's in the other two. Which, and why?
Piss-up puzzle

You know that the "Ale & Whisky" crate must contain either ale only, or whisky only. If you open it and find whisky, you know that the crate labelled "Whisky" must by the ale one, and the "Ale" one must be the ale and whisky one. Now stop thinking and have a drink.

Piss-up puzzle